Dust collection and ventilation device for tunnel construction

Abstract

The invention provides a dust collection and ventilation device for tunnel construction, and relates to the field of tunnel construction, the dust collection and ventilation device comprises a driving assembly, the outer side of the driving assembly is provided with a sweeping assembly used for dust removal, one side of the driving assembly is provided with a dust collection assembly used for dust collection, and the driving assembly comprises a center pipe; a ventilating fan is arranged on the inner side of the central pipe, the sweeping assembly comprises electric telescopic rods symmetrically arranged on the outer side of the central pipe in an array mode, arc plates are arranged above the central pipe in an array mode, a bottom plate is arranged below the electric telescopic rods, and side plates are arranged on the two sides of the bottom plate at intervals. The bottom plate, the side plates and the arc plates are arranged to be matched with the electric telescopic rods arranged on the inner sides of the bottom plate, the side plates and the arc plates in an array mode, the different electric telescopic rods are controlled to extend by different lengths, then the shapes of the bottom plate, the side plates and the arc plates are changed, a synchronous belt is better attached to the inner wall of a tunnel, and at the moment, the inner wall of the tunnel is conveniently and efficiently cleaned through cooperation with a scraper.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction, and more particularly, to a dust collection and ventilation device for tunnel construction. Background Art

[0002] High-speed rail tunnels are a key part of high-speed railway construction, characterized by large cross-sections, high structural strength, and high construction technical requirements. Generally composed of main buildings (such as tunnel linings and portals) and accessory buildings (such as ventilation and waterproofing and drainage facilities), currently, before a high-speed rail tunnel is officially opened to traffic after construction, it is necessary to clean the dust inside it and the particulate impurities adhering to the inner wall, and perform integrated ventilation operations on the tunnel. The existing operation method is to use mobile equipment to pull dust removal tools to clean and suck the dust from the inner wall of the tunnel. When using this method, there are problems that due to the non-fitting of the cleaning equipment, the cleaning force is limited, and at the same time, during dust removal, it is impossible to make corresponding adjustments according to the dust content, resulting in poor cleaning effects.

[0003] For example: The "Method for Ventilation and Dust Removal during Construction of High-Speed Rail Tunnels" disclosed in the Chinese invention patent (application number: CN202410100234.7), its specification discloses that high-speed rail tunnels refer to tunnels built for high-speed railway trains to pass through mountainous or hilly areas. During the construction of high-speed rail tunnels, a large amount of dust, dirt and other pollutants will be generated. Before the high-speed rail tunnel is opened to traffic, it is necessary to ventilate and remove dust inside the tunnel to remove impurities such as dust in the tunnel and make preparations for the subsequent smooth opening of the high-speed rail tunnel. However, there are the following problems in the ventilation and dust removal process of current high-speed rail tunnels before opening to traffic: 1. During the ventilation and dust removal process, usually, a dust removal tool moving with mobile equipment is used to clean the inner wall of the tunnel in a single direction and suck the removed dust and other impurities. The cleaning force is limited, and the cleaning effect on stubborn attachments on the inner wall of the tunnel is not good, resulting in a low overall dust removal effect. 2. During the ventilation and dust removal process of high-speed rail tunnels, it is impossible to flexibly make corresponding changes and adjustments according to the height of the tunnel or the dust content in the tunnel, resulting in ineffective removal of dust in the tunnel; the above patent can prove the defects existing in the prior art.

[0004] Therefore, we make improvements and propose a dust collection and ventilation device for tunnel construction. Summary of the Invention

[0005] The purpose of the present invention is: For the existing tunnel integrated ventilation device, when cleaning and sucking the dust from the inner wall of the tunnel, due to the non-fitting of the cleaning equipment with the inner wall of the tunnel and the inability to adjust the cleaning equipment, the cleaning force is limited, and at the same time, during dust removal, it is impossible to make corresponding adjustments according to the dust content, resulting in poor cleaning effects.

[0006] To achieve the above-mentioned invention object, the present invention provides a dust collection and ventilation device for tunnel construction to improve the above problems.

[0007] Specifically, this application is as follows:

[0008] It includes a driving component. A cleaning component for dust removal is arranged outside the driving component, and a dust collection component for dust collection is arranged on one side of the driving component. The driving component includes a central tube, and an air exchange fan is arranged inside the central tube. The cleaning component includes electric telescopic rods symmetrically arranged outside the central tube. Arc plates are arranged in an array above the central tube. A bottom plate is arranged below the electric telescopic rods. Side plates are arranged at intervals on both sides of the bottom plate. The dust collection component includes a dust collection box arranged on one side of the central tube. The upper half of the outside of the dust collection box is provided with a first dust suction pipe, and second dust suction pipes are symmetrically arranged below the first dust suction pipe.

[0009] As a preferred technical solution of this application, a servo motor is arranged below the central tube, and an installation frame is arranged at the bottom of the servo motor. The outside of the installation frame is fixedly connected to the side wall of the telescopic end of a group of the electric telescopic rods.

[0010] As a preferred technical solution of this application, a gear is arranged inside the installation frame. One end of the gear is sleeved with the installation frame, and the top of the gear meshes with the cleaning component. The output end of the servo motor is sequentially sleeved with two groups of conveyor belts. One group of the conveyor belts penetrates through the bottom of the central tube and meshes with the air exchange fan, and the other group of the conveyor belts meshes with the end of the gear away from the servo motor.

[0011] As a preferred technical solution of this application, six groups of installation grooves are arrayed inside the central tube near the end connected to the dust collection box. One end of the central tube is sleeved with an installation disc through the installation grooves, and the installation disc is connected to the dust collection component.

[0012] As a preferred technical solution of this application, a filter screen is fixedly installed inside the central tube on the side away from the dust collection component, and the filter screen is bolted to the inside of the central tube.

[0013] As a preferred technical solution of this application, the cleaning component further includes a synchronous belt sleeved outside the bottom plate, side plates and arc plates. Teeth are arrayed inside the synchronous belt, and the synchronous belt meshes with the gear through the teeth.

[0014] As a preferred technical solution of this application, baffles are symmetrically arranged on both sides of the synchronous belt, and fixing plates are arrayed and installed on the outside of the synchronous belt. The fixing plates are arranged obliquely.

[0015] As a preferred technical solution of this application, a scraper is clamped on the top of the fixing plate, and mounting shafts extend from both ends of the scraper.

[0016] As a preferred technical solution of the present application, the dust collection assembly further includes mounting members and connecting pipes that are arranged in a spaced array outside the dust collection box. There are three sets of both the mounting members and the connecting pipes. The connecting pipes are respectively connected to the first dust suction pipe and the two second dust suction pipes.

[0017] As a preferred technical solution of the present application, the inner side of the dust collection box is bolted to the mounting plate. A dust screen is provided in the inner cavity of the dust collection box. Mounting ring plates are sequentially arranged on the outer sides of the two second dust suction pipes, and the mounting ring plates are matched with the scraping plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the solution of the present application:

[0020] 1. In order to solve the problem that in the prior art, the cleaning device cannot completely fit the inside of the tunnel, resulting in poor cleaning effect, in the present application, by providing a bottom plate, side plates and arc plates and the electric telescopic rods arranged in an array on the inner side thereof, it is realized that by controlling different electric telescopic rods to extend different lengths, the shapes of the bottom plate, side plates and arc plates are changed, so that the synchronous belt fits the inner wall of the tunnel more closely. At this time, with the cooperation of the scraping plate, it is convenient to efficiently clean the inner wall of the tunnel;

[0021] 2. By providing a dust collection box and the mounting members arranged in an array on the outside thereof, it is realized that by changing the mounting surface of the dust collection box and the mounting plate, it is convenient to change the air exchange direction and air exchange intensity of the ventilation fan, and the problem that in the prior art, corresponding adjustment cannot be realized according to the dust amount inside the tunnel is solved. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the dust collection and ventilation device for tunnel construction provided by the present application in the dragged state;

[0023] Figure 2 It is a schematic side structural diagram of the dust collection and ventilation device for tunnel construction provided by the present application in the dragged state;

[0024] Figure 3 It is a side view of the structure of the dust collection and ventilation device for tunnel construction provided by the present application in the dragged state;

[0025] Figure 4 It is a schematic structural diagram of the dust collection and ventilation device for tunnel construction provided by the present application in the suspended state;

[0026] Figure 5 It is a schematic side structural diagram of the dust collection and ventilation device for tunnel construction provided by the present application in the suspended state;

[0027] Figure 6Structural side view of the hanging state of the dust collection and ventilation device for tunnel construction provided by this application;

[0028] Figure 7 Exploded view of the splicing structure of the fixing plate of the dust collection and ventilation device for tunnel construction provided by this application;

[0029] Figure 8 Schematic diagram of the splicing structure of the scraper of the dust collection and ventilation device for tunnel construction provided by this application;

[0030] Figure 9 Schematic diagram of the structure of the dust collection component of the dust collection and ventilation device for tunnel construction provided by this application;

[0031] Figure 10 Schematic diagram of the connection structure of the electric telescopic rod of the dust collection and ventilation device for tunnel construction provided by this application;

[0032] Figure 11 Schematic diagram of the connection structure of the synchronous belt of the dust collection and ventilation device for tunnel construction provided by this application;

[0033] Figure 12 Schematic diagram of the connection structure of the central pipe of the dust collection and ventilation device for tunnel construction provided by this application;

[0034] Figure 13 Structural side view of the connection structure of the central pipe of the dust collection and ventilation device for tunnel construction provided by this application.

[0035] Indications in the figure:

[0036] 1. Driving component; 101. Central pipe; 102. Exhaust fan; 103. Servo motor; 104. Conveyor belt; 105. Connector; 106. Installation groove; 107. Installation plate; 108. Bolt groove; 109. Gear; 110. Installation frame; 111. Filter screen;

[0037] 2. Cleaning component; 201. Electric telescopic rod; 202. Bottom plate; 203. Side plate; 204. Arc plate; 205. Synchronous belt; 206. Baffle; 207. Fixing plate; 208. Scraper;

[0038] 3. Dust collection component; 301. Dust collection box; 302. Installation part; 303. Connecting pipe; 304. First dust suction pipe; 305. Second dust suction pipe; 306. Installation ring plate. Detailed implementation manners

[0039] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] As described in the background art, for the existing tunnel integrated ventilation device, when cleaning and dust suction are performed on the inner wall of the tunnel, due to the non - fitting of the cleaning device with the inner wall of the tunnel and the inability to adjust the cleaning device, the cleaning force is limited. At the same time, during dust removal, it is impossible to make corresponding adjustments according to the dust content, resulting in poor cleaning effects.

[0041] To solve this technical problem, the present invention provides a dust - collecting ventilation device for tunnel construction, which is applied to an adjustable tunnel dust - collecting ventilation device.

[0042] Specifically, please refer to Figures 1-13 , the dust - collecting ventilation device for tunnel construction specifically includes a driving assembly 1. A cleaning assembly 2 for dust removal is arranged outside the driving assembly 1. A dust - collecting assembly 3 for dust collection is arranged on one side of the driving assembly 1. The driving assembly 1 includes a central pipe 101. An air change fan 102 is arranged inside the central pipe 101. Connecting pieces 105 are symmetrically arrayed outside the central pipe 101. The cleaning assembly 2 includes electric telescopic rods 201 symmetrically arrayed outside the central pipe 101. There are six groups of electric telescopic rods 201 on both sides, and each group of electric telescopic rods 201 has three. Arc plates 204 are arrayed above the central pipe 101. A bottom plate 202 is arranged below the electric telescopic rods 201. Side plates 203 are spaced on both sides of the bottom plate 202. Connecting pieces 105 are arrayed on the inner sides of the bottom plate 202, side plates 203 and arc plates 204. Moreover, the bottom plate 202, side plates 203 and arc plates 204 are all connected to the telescopic ends of the electric telescopic rods 201 through the connecting pieces 105. The fixed ends of the electric telescopic rods 201 are connected to the outside of the central pipe 101 through the connecting pieces 105. The bottom plate 202, side plates 203 and arc plates 204 are all made of elastic steel plates. The dust - collecting assembly 3 includes a dust - collecting box 301 arranged on one side of the central pipe 101. The upper half of the outside of the dust - collecting box 301 is provided with a first dust - suction pipe 304. Second dust - suction pipes 305 are symmetrically arranged below the first dust - suction pipe 304. The first dust - suction pipe 304 and the second dust - suction pipes 305 are arrayed.

[0043] The dust collection and ventilation device for tunnel construction provided by the present invention realizes changing the shapes of the bottom plate, side plates and arc plates by controlling the different electric telescopic rods to extend different lengths through the cooperation of the bottom plate, side plates and arc plates and the electric telescopic rods arranged in an array on the inner side thereof, so that the synchronous belt fits the inner wall of the tunnel more closely. At this time, with the cooperation of the scraper, it is convenient to efficiently clean the inner wall of the tunnel.

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings.

[0045] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] Example 1, please refer to Figure 11 、 Figure 12 and Figure 13 A dust collection and ventilation device for tunnel construction, a servo motor 103 is arranged below the central pipe 101, an installation frame 110 is arranged at the bottom of the servo motor 103, the installation frame 110 is in a right-angled shape, and the outer side of the installation frame 110 is fixedly connected to the side wall of the telescopic end of a group of electric telescopic rods 201.

[0048] A gear 109 is arranged inside the installation frame 110, one end of the gear 109 is sleeved with the installation frame 110, the top of the gear 109 is engaged with the cleaning assembly 2, the output end of the servo motor 103 is sequentially sleeved with two groups of conveyor belts 104, one group of conveyor belts 104 penetrates through the bottom of the central pipe 101 and is engaged with the air change fan 102, and the other group of conveyor belts 104 is engaged with the end of the gear 109 far from the servo motor 103;

[0049] The servo motor 103 cooperates with the two groups of conveyor belts 104 arranged at its output end to drive the air change fan 102 and the gear 109 to rotate respectively. When the air change fan 102 rotates, the air change operation of the inner side of the tunnel can be realized. When the gear 109 rotates, it is used to provide power for the cleaning assembly 2.

[0050] Six groups of installation grooves 106 are arranged in an array on the inner side of the central pipe 101 near one end of the dust collection box 301. Twelve groups of bolt grooves 108 penetrate through the outer side of the central pipe 101 in an array. Every two groups of bolt grooves 108 are located on both sides of the installation groove 106. One end of the central pipe 101 is sleeved with an installation disk 107 through the installation groove 106, and the installation disk 107 is connected to the dust collection assembly 3;

[0051] The mounting disc 107 is bolted to the central tube 101 through the mounting groove 106.

[0052] A filter screen 111 is fixedly installed on the inner side of the central tube 101 away from the dust collection assembly 3, and the filter screen 111 is bolted to the inner side of the central tube 101.

[0053] Example 2 further optimizes the dust collection and ventilation device for tunnel construction provided in Example 1. Specifically, as Figure 7 、 Figure 8 、 Figure 11 And Figure 12 As shown in, the cleaning assembly 2 further includes a synchronous belt 205 sleeved on the outer sides of the bottom plate 202, the side plates 203 and the arc plate 204. Teeth are arrayed on the inner side of the synchronous belt 205, and the synchronous belt 205 is meshed with the gear 109 through the teeth.

[0054] Baffles 206 are symmetrically arranged on both sides of the synchronous belt 205, and fixing plates 207 are arrayed and installed on the outer side of the synchronous belt 205. The fixing plates 207 are inclined.

[0055] A scraper 208 is clamped on the top of the fixing plate 207, and mounting shafts extend from both ends of the scraper 208;

[0056] Driven by the arrayed electric telescopic rods 201, the corresponding bottom plate 202, side plate 203 or arc plate 204 is moved, and by changing the telescopic lengths of different electric telescopic rods 201, the connected bottom plate 202, side plate 203 or arc plate 204 is deformed, so as to perform fitting adjustment according to the shape of the tunnel inner wall, ensuring that the scraper 208 can completely fit on the inner wall of the tunnel. When the gear 109 rotates, it will drive the meshed synchronous belt 205, baffle 206, fixing plate 207 and scraper 208 to rotate, and then the inner wall of the tunnel is cleaned by the scraper 208.

[0057] Example 3 further optimizes the dust collection and ventilation device for tunnel construction provided in Example 1 or 2. Specifically, as Figure 4 、 Figure 5 、 Figure 8 And Figure 9 As shown in, the dust collection assembly 3 further includes mounting parts 302 and connecting pipes 303 spaced and arrayed on the outer side of the dust collection box 301. There are three groups of both the mounting parts 302 and the connecting pipes 303. The connecting pipes 303 are respectively pipe-connected to the first dust suction pipe 304 and two groups of second dust suction pipes 305.

[0058] The inner side of the dust collection box 301 is bolted to the mounting disc 107. A dust screen is arranged in the inner cavity of the dust collection box 301. Mounting ring plates 306 are sequentially arranged on the outer sides of the two groups of second dust suction pipes 305, and the mounting ring plates 306 are matched with the scraper 208;

[0059] When the inner side of the dust collection box 301 is connected to the central pipe 101 through the mounting plate 107, when the ventilation fan 102 is started at this time, a negative pressure can be formed inside the first dust suction pipe 304 and the second dust suction pipe 305 through the mounting plate 107 and the dust collection box 301, so that the outer surface of the synchronous belt 205 can be dusted, and thus the dust collection operation can be realized.

[0060] The use process of the dust collection and ventilation device for tunnel construction provided by the present invention is as follows:

[0061] Suspension: When in use, first take out the device and install the device on one side of the mobile device through bolts through the mounting member 302 provided on one side of the device. At this time, the synchronous belt 205 on the outer side of the device and the scraper 208 provided on the outer side of the synchronous belt 205 are in contact with the ground of the tunnel and are slightly bent, and then the device is driven to move by the mobile device;

[0062] Fitting: After suspension, the device is moved to the inner wall of the tunnel by the mobile device, and the outer side of the device is made to fit the inner wall of the tunnel as much as possible. Then, the electric telescopic rods 201 arranged in an array at both ends of the central pipe 101 are started in sequence, and by changing the telescopic lengths of different electric telescopic rods 201, the corresponding bottom plate 202, side plate 203 and arc plate 204 are deformed and continuously fit to the inner wall of the tunnel until they are completely fitted to the inner wall of the tunnel;

[0063] Cleaning: When the device moves, the servo motor 102 is started, and the ventilation fan 102 and the gear 109 are driven to rotate with the synchronous belt 205 through two groups of conveyor belts 104 arranged in sequence at the output end thereof. When the synchronous belt 205 rotates, the inner wall of the tunnel is cleaned through the fixing plate 207 and the scraper 208 provided on the outer side thereof. The solid particles scraped off during the cleaning process fall on the top of the synchronous belt 205 and accumulate between the fixing plates 207 arranged in an array. At this time, the ventilation fan 102 sucks the particulate impurities scraped off by the scraper 308 through the dust collection box 301 and the first dust suction pipe 304 and the second dust suction pipe 305 provided on the outer side thereof. The particulate impurities sucked into the first dust suction pipe 304 and the second dust suction pipe 305 will be filtered by the dust screen inside the dust collection box 301 and accumulate inside it. This process is repeated to complete the dust collection operation;

[0064] Vacuum cleaning: After cleaning, the dust collection box 301 and the second suction pipe 305 can be removed by loosening the bolts. The dust collection box 301 is turned over and reinstalled with the mounting plate 107 through the mounting parts 302 and connecting pipes 303 arranged at intervals on its outer side. At this time, there is a gap between the dust collection box 301 and the central pipe 101, which facilitates the flow of gas. Then, the two groups of second suction pipes 305 are respectively installed at the bottom of the bottom plate 202. Then, the scraping plates 208 clamped outside the fixing plate 207 are removed at intervals and spliced on the outer side of the second suction pipes 305, and are fixed by the mounting ring plates 306 fixedly installed on the outer sides of the second suction pipes 305. Then, it is connected to the mobile device through the other side of the dust collection box 301. At this time, the spliced scraping plates 208 at the bottom of the device are in contact with the tunnel floor, and it moves in cooperation with the mobile device. Then, it cooperates with the ventilation fan 102 to realize the mobile ventilation operation.

[0065] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0066] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The drawings show the preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields is similarly within the scope of the patent protection of the present invention.

Claims

1. A dust collection and ventilation device for tunnel construction, characterized in that, It includes a driving component (1), and a cleaning component (2) for dust removal is arranged outside the driving component (1). A dust collection component (3) for dust collection is arranged on one side of the driving component (1). The driving component (1) includes a central tube (101), and a ventilation fan (102) is arranged inside the central tube (101). The cleaning component (2) includes electric telescopic rods (201) symmetrically arranged outside the central tube (101). Arc plates (204) are arranged in an array above the central tube (101). A bottom plate (202) is arranged below the electric telescopic rod (201). Side plates (203) are arranged at intervals on both sides of the bottom plate (202). The dust collection component (3) includes a dust collection box (301) arranged on one side of the central tube (101). The upper half of the outside of the dust collection box (301) is provided with a first dust suction pipe (304). Second dust suction pipes (305) are symmetrically arranged below the first dust suction pipe (304).

2. The dust collecting and ventilation device for tunnel construction according to claim 1, characterized in that, A servo motor (103) is arranged below the central tube (101). A mounting bracket (110) is arranged at the bottom of the servo motor (103). The outside of the mounting bracket (110) is fixedly connected to the side wall of the telescopic end of a group of the electric telescopic rods (201).

3. The dust collection and ventilation device for tunnel construction according to claim 2, characterized in that, A gear (109) is arranged inside the mounting bracket (110). One end of the gear (109) is sleeved with the mounting bracket (110). The top of the gear (109) meshes with the cleaning component (2). The output end of the servo motor (103) is sequentially sleeved with two groups of conveyor belts (104). One group of the conveyor belts (104) penetrates through the bottom of the central tube (101) and meshes with the ventilation fan (102). The other group of the conveyor belts (104) meshes with the end of the gear (109) away from the servo motor (103).

4. The dust collection and ventilation device for tunnel construction according to claim 3, wherein Six groups of mounting grooves (106) are arranged in an array on the inner side of one end of the central tube (101) close to the dust collection box (301). One end of the central tube (101) is sleeved with a mounting disc (107) through the mounting grooves (106), and the mounting disc (107) is connected to the dust collection component (3).

5. The dust collecting and ventilation device for tunnel construction according to claim 4, wherein, A filter screen (111) is fixedly installed on the inner side of the side of the central tube (101) away from the dust collection component (3), and the filter screen (111) is bolted to the inner side of the central tube (101).

6. The dust collection and ventilation device for tunnel construction according to claim 5, wherein The cleaning component (2) further includes a synchronous belt (205) sleeved outside the bottom plate (202), the side plates (203) and the arc plates (204). Teeth are arranged in an array on the inner side of the synchronous belt (205), and the synchronous belt (205) meshes with the gear (109) through the teeth.

7. The dust collecting and ventilation device for tunnel construction according to claim 6, characterized in that, Baffles (206) are symmetrically arranged on both sides of the synchronous belt (205). Fixing plates (207) are arranged in an array on the outside of the synchronous belt (205), and the fixing plates (207) are arranged obliquely.

8. A dust collection and ventilation device for tunnel construction according to claim 7, characterized in that, A scraper (208) is clamped at the top of the fixing plate (207), and mounting shafts extend from both ends of the scraper (208).

9. The dust collection and ventilation device for tunnel construction according to claim 8, characterized in that, The dust collection assembly (3) further includes mounting members (302) and connecting pipes (303) that are arranged in a spaced array outside the dust collection box (301). There are three sets of both the mounting members (302) and the connecting pipes (303). The connecting pipes (303) are respectively connected to the first dust suction pipe (304) and two of the second dust suction pipes (305) by pipe joints.

10. A dust collecting and ventilation device for tunnel construction according to claim 9, characterized in that, The inner side of the dust collection box (301) is bolted to the mounting plate (107). A dust screen is provided in the inner cavity of the dust collection box (301). Mounting ring plates (306) are sequentially arranged on the outer sides of the two second dust suction pipes (305), and the mounting ring plates (306) are matched with the scraping plates (208).

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